Intelligent Reference/TM-4D User Manual Addendum
Contents
1. WIDTH 18 950 in 481 mm front panel 17 7 in 449 mm rear panel DEPTH 8 375 in 213 mm excluding connectors WEIGHT 6 75 Ibs 3 07 kg typical PHYSICAL GPS TIMING ANTENNA HEIGHT 5 0 in 126 6 mm DIAMETER 3 54 in 90 0 mm WEIGHT 0 66 Ibs 0 30 kg MOUNTING Marine thread 1 0 14UNS2A pole mount Optional flush and 1 25 mast mount 4 in stainless steel masts available with flange base or as L bracket style CABLE RG 58 50 ft with TNC connectors standard Longer cables optional ENVIRONMENTAL TM 4D STORAGE TEMPERATURE 40 to 85 C OPERATING TEMPERATURE 20 to 70 C HUMIDITY Up to 95 RH non condensing ENVIRONMENTAL GPS TIMING ANTENNA OPERATING TEMPERATURE 45 to 85 C HUMIDITY Water resistant all weather PERFORMANCE FREQUENCY GPS CORRECTED 10 MHz SINE WAVE FREQUENCY OUTPUT Conditions Time Valid Tuning in Mode 4 Long term Stability while tracking 1x10712 after 24 hours of tracking At 24 hours Short term Stability 1x10711 At 1 second Accuracy while coasting 5x10710 per day after 3 days of locked operation Phase Noise 1 Hz Bandwidth 10 Hz lt 124 dBc 100 Hz lt 139 dBc 1 kHz lt 149 dBc 10 kHz lt 151 dBc 100 kHz 155 dBc Harmonic Outputs 50 dBc Spurious Outputs 70 dBc Level 10 dBm nominal into 50 ohms PERFORMANCE TIME 1 PPS OUTPUT Referenced to UTC Conditions Time Valid Accuracy 25 ns erp Accuracy while coasting2. Use a brand new blade From the front first cut a cross in each hole Next cut out each pie slice of every hole along its arc trying not to nick the aluminum Use caution as the laminate is thick and may be somewhat difficult to cut CONNECTION TO A PERSONAL COMPUTER The Intelligent Reference TM 4 is connected to a personal computer by means of the DB 9 or the DB 15HD connector located on the rear of the unit If you wish to use the supplied Control Display software you must use a 32 bit Windows based computer with a free serial port Since the message output from the Intelligent Reference TM 4D M is simple ASCII you may also easily create your own control software You can use a longer serial cable up to 50 feet but make sure that it is fully shielded in order to prevent unwanted radiation from the cable Many computer suppliers carry shielded monochrome monitor cables 9 pin in various lengths that are suitable for this application If the serial port on your computer has a DB25 connector instead of a DB9 connector use a DB9 to DB25 adapter available from most any computer supplier In the case where a serial port is not available as is the case with many newer laptop computers you may use a serial to USB adapter The software defaults on first use to COMI If you plan to use a port other than COMI make a note of the port you choose so that you can set the software to match POWER INPUT Power is supplied to the unit vi
3. DC plug 5 Usea shielded cable to supply external DC power to the unit 1f you are not using the AC adapter 6 Locate the unit as far away as possible from any other equipment in your system that may be particularly sensitive to interference particularly receivers antenna cables and antennas These same precautions will also be helpful in avoiding adverse effects on the operation of the TM 4D from other nearby equipment CONTACTING SPECTRUM If you need to contact Spectrum please telephone or write to us at Spectrum Instruments Inc 5770 East Arrow Highway Suite D San Dimas California 91773 Phone 909 971 9710 E mail support spectruminstruments com Before you call please have the following information available so that we may better assist you in trying to resolve the problem immediately 1 Model number and serial number of the unit 2 Purchase date 3 An accurate description of the problem Page 15 LIMITED WARRANTY Spectrum Instruments Inc Spectrum warrants its products to have been manufactured in accordance with its standard manufacturing practices and to be free from defects in material and workmanship for a period of three 3 years from date of shipment During the warranty period Spectrum will at its option either repair or replace products which prove to be defective The repaired or replaced product will be warranted for the balance of the original warranty extended by the amount of time the product
4. Optionally there may be four additional outputs available on the front of the unit Signal selection is accomplished via the internal configuration jumpers JP9 and JP10 Each output is designed to drive a 50 ohm load INTERNAL TM 4 OUT1 SIGNAL CHARACTERISTICS The OUTI terminal on the internal TM 4 is capable of supplying either an analog or digital signal depending upon how the unit is configured at the factory For example it may supply modulated IRIG B serial time code in which case the signal would be analog Conversely it may supply a custom or additional standard digital signal of some type It is important to know what type of signal 1s present and to which section type analog or digital it must be routed Routing the signal to the incorrect section will result in unsatisfactory or no output WARM UP AND OPERATING CURRENTS If you are planning to operate the Intelligent Reference TM 4D on a power supply other than that supplied by Spectrum the chart below depicts typical maximum current requirements for 12 and 24 volt operation with all outputs enabled and driving a 50 ohm load including optional front outputs Various factors may affect these values somewhat These include installed options OCXO type number of outputs enabled and load ambient temperature and time valid condition The current requirement for the warm up phase will be initially high then will settle to a lower value When the internal TM 4 achieves the time valid con
5. Same as primary frequency output PERFORMANCE GPS RECEIVER TYPE Twelve parallel channel code and carrier tracking CA code L1 carrier TIME TO FIRST FIX Hot Start 15 seconds typical valid almanac time date position and ephemeris Warm Start 40 seconds typical valid almanac time date and position Cold Start 60 seconds typical no information POSITION UPDATE RATE Once per second nominal MAXIMUM VELOCITY 1000 knots 515 m s MAXIMUM ACCELERATION 2 g POSITION ACCURACY Less than 15 M SEP Page 18 STANDARD FEATURES 16 buffered digital outputs Allows distribution of up to four different signals to any combination of four digital output banks 8 isolated analog outputs Allows distribution of up to two different signals to either or both analog output banks Programmed Output Pulse POP User programmable precisely timed output pulses Interval resolution 100 nanoseconds Accuracy to UTC 25 nanoseconds POP One Shot mode and POP Repeat mode User selectable pulse width and polarity Event Time Tag ETT Snapshot date and time of external signal event Tag resolution 100 nanoseconds Positive or negative going transition trigger Minimum latency between events 4 ms maximum rate 30 events per second NMEA and ASCII Time Messages User selectable message format on separate RS 232 serial channel Spectrum format serial time message NMEA messages GPZDA GPRMC and GPGGA User Time Bias Compensa
6. delivered signal be sure to configure the 10 MHz termination jumper correctly If 10 MHz is not to be used at all terminate the signal using JP11 located near the internal TM 4 module If 10 MHz is delivered via one set of outputs use the terminating jumper for that section and do not use JP11 ANALOG OUTPUT CONFIGURATION JUMPER BLOCKS JP9 and JP10 POSITION SIGNAL SIGNAL TYPE FUNCTION TM 4 10 MHZ INTERNAL TM 4 GENERATED PRIMARY FREQUENCY OUTPUT FILTER A B INTERNAL SYNTH GENERATED S S CONVERTOR OUTPUT FRONT JACK EXTERNAL USER SUPPLIED ANALOG INPUTS FROM FRONT REAR JACK EXTERNAL USER SUPPLIED ANALOG INPUTS FROM REAR TM 4 OUT1 INTERNAL TM 4 GENERATED OPTIONAL TM 4 ANALOG SIGNAL FA FB ENABLE OUTPUT ENABLE FRONT OUTPUT A B TERM N A INTERNAL TERMINATE AT 50 OHMS Omit jumpers in bridged mode or when both stages are using the same input signal for a 50 ohm termination Page 8 ANTENNA INPUT The GPS antenna is connected via a standard TNC connector Power for the antenna 5 VDC is supplied from the internal TM 4 For best timing performance Spectrum supplies an approved antenna with the TM 4D but you may use any active GPS antenna that operates on 5 volts Note that some non Spectrum antennas with very low current consumption may trigger the antenna alarm DIGITAL AND ANALOG SIGNAL OUTPUTS Signals generated by the TM 4D always appear at the rear panel BNC outputs If your TM 4D includes optional front outputs you
7. eoe POE LEER ERR REA PRRRRERU SERRE 9 DIGITAL AND ANALOG SIGNAL OUTPUTS ssss HH 9 DIGITAL AND ANALOG EXTERNAL SIGNAL 9 SECTION 5 OPERATION OF THE TM 4D eere SECTION 6 HARDWARE INFORMATION eere 17 FRONT PANEL I ee declive ne ep nM ec a ee ee 11 LED COMBINATIONS AND THEIR 12 POWERINBUT si Es 12 FID 3 D SUB CONNECTOR iier teet re ep ere a tah reet 13 DB 8 CONNEGCTOR eer tials cesta mo temi A eer ERR 13 EXTERNAL DIGITAL INPUTS 1 4 13 EXTERNAL ANALOG INPUTS A AND 14 DIGEFAL OUTPUTS IAA e etre e I DOO REPRE Ren 14 ANALOG OUTPUTS AAND B x trem e a EEEE OET i 14 INTERNAL TM 4 OUT1 SIGNAL 14 WARM UP AND OPERATING CURRENTS ssss IH 14 SECTION 7 IN CASE OF DIFFICULTY errem 15 CONTACTING SPECTRUM eme em ee e mere enne 15 LIMITED WARRANTY iet edad ehe dee a der vere ted needed an 16 RETURNING EQUIPMENT FOR 16 APPENDIX A nnne nnns 18 iii SECTION 1 INTRODUCTION INTRODUCTION TO THE INTELLIEGN
8. included with the TM 4D In cases where the Spectrum power supply is not being used you may supply power to the Intelligent Reference TM 4D M from any source that can supply a clean DC voltage in the range of 12 to 35 VDC at 2 amperes Use caution when supplying power and be sure to observe correct polarity of the power supply The center pin of the DC input jack must be positive The Intelligent Reference TM 4D contains an internal AGC 3 fuse that is user replaceable Avoid applying power to the unit with the power switch depressed in the ON position Make the power connection first then apply power with the switch There is a one to six minute depending on the type of oscillator installed and its temperature at start up period during which the unit requires more power than that normally required when operating Note that the period of higher current consumption can be shorter than the fixed oscillator warm up period Mode 1 time if the oscillator is already warm Page 12 DB 15HD CONNECTOR The DB 15HD connector on the rear of the unit is connected in parallel to the connector for the internal TM 4 with the exception of the power pin This makes it possible to use all accessories and cables designed for a standalone TM 4 with the TM 4D As indicated in the signal flow diagrams this connector is also in parallel with the digital and analog input selector jumper blocks All of the outputs supplied by the TM 4 go to both the input jumpe
9. may enable and disable them via the appropriate jumper block settings DIGITAL AND ANALOG EXTERNAL SIGNAL INPUTS oPTIONAL Depending upon configuration your TM 4D may include rear panel and or front panel BNC input jacks that you may use to distribute external signals you supply Page 9 SECTION 5 OPERATION OF THE INTELLIGENT REFERENCE TM 4D The Intelligent Reference TM 4D contains an Intelligent Reference TM 4 OEM module internally It is highly recommended that you read the accompanying companion manual for the Intelligent Reference TM 4 to become familiar with its operational characteristics and advanced capabilities Installation and operation of the Control Display software is also described in that manual Operation of the TM 4D is relatively simple After connecting the power supply the GPS antenna and the desired input and output connections apply power to the unit by depressing the power switch The POWER LED on the left of the unit should light immediately and you should also see the ALARM READY and STATUS LEDs flash momentarily as the internal TM 4 initializes The state of the ANALOG and DIGITAL LEDs will depend upon the nature of the signals that are present The unit must complete a process of initialization and self tuning before it achieves its highest level of accuracy If you are not familiar with the start up modes of the TM 4 this would be a good time to look at Section 4 of the TM 4 manual Note that on
10. on continuously if signal is present The DIGITAL indicators will generally not illuminate or flash until the unit has achieved the Time Valid state since those signals are generally not available until then If the TM 4D is configured for external inputs the corresponding LEDs will illuminate immediately after power up providing that those signals are present Page 10 SECTION 6 HARDWARE INFORMATION This section of the manual provides detailed information on the Intelligent Reference TM 4D hardware including power specifications input output signal definitions and specifications connector and pin assignments and other miscellaneous hardware details FRONT PANEL The front panel of the TM 4D includes ten LED indicators that provide operating system and signal status These LEDs may be off steadily illuminated or they may flash Important information about the unit is conveyed by various combinations of the states of these indicators The information on the following pages will also help you to understand the various combinations possible and how they relate to the current status of the unit POWER LED This LED indicates that the unit is on ANALOG A amp B LEDs These indicators will illuminate when analog signals are present at the output of the corresponding analog signal jumper blocks DIGITAL 1 4 LEDs These indicators will illuminate when digital signals are present at the output of the corresponding digital signal j
11. setup can be as simple as connecting the power supply GPS antenna cable and desired output connections and then turning the unit on To configure the TM 4D for different output choices you will need to remove the top cover and change jumper settings Refer to the diagram for jumper block locations for the analog and digital output banks TM 4 10 MHz FILTER B FRONT JACK REAR JACK TM 4 OUT 1 INTERNAL TM 4 IGITAR OUT EE OUT 1 EN OUT 2 MUX1 TM 4 10 MHz DIGITAL OUT 3 POP FILTER A MUX 2 FRONT JACK TTL DIGITAL 1 REAR JACK TTL DIGITAL 2 TM 4 OUT 1 TTL DIGITAL 3 FA ENABLE DIGITAL OUT 2 TTL DIGITAL 4 TERM ooo TERM JP5 JP8 DBF 1 4 ENABLE J DIGITAL OUT 1 5 ANALOG A ANALOG B JP11 TM 4 10 MHz TERMINATE JP12 ANALOG INPUT BRIDGE FUSE AGC TM 4D BOARD LAYOUT and JUMPER LOCATIONS Select the output signal that you desire for each particular output bank by moving the jumper to the corresponding choice If you desire an internal signal termination of 50 ohms for a particular digital or analog section install the jumper on the TERM location Note that 1f you send identical signals to more than one output bank you should only use one terminator jumper for the combined group since they are now in parallel with each other Run the Control Display software to configure the internal TM 4 to set options such as MUX frequency POP time etc You will need the 9 pin cable to communicate with the unit I
12. unit reaches Mode 4 Event Time Tag Programmed Output Pulse and the MUX outputs are also not made available until the unit reaches this point For best accuracy of frequency related functions MUX out primary frequency output optional signals allow the unit to progress to Mode 4 indicated by the READY LED illuminating steadily before using them If GPS satellite signals are temporarily blocked or interrupted the TM 4 continues to provide accurate timing information and output signals by using its internal oscillator as a reference until the signals are reacquired It may be helpful to place the unit in Static timing mode during difficult GPS reception conditions since only a single satellite is required to provide accurate timing information in this mode See the TM 4 manual for important details about how and when to use Static timing mode The accuracy of the internal oscillator in hold no GPS available is dependent upon several factors including the tuning state the unit was in when the interruption occurred the oscillator option installed and the TM 4 s Intelligent Holdover technology The availability and generation of various signals is different during the initialization and warm up phases than during normal locked operation Because of this the indicator LEDs will behave differently during these phases In a standard unit with no external inputs the ANALOG signal indicators will generally appear almost immediately and will be
13. INTELLIGENT REFERENCE TM 4D TIME amp FREGUENCY SYSTEM ADDENDUM TO TM 4 USER MANUAL MANUAL PART NUMBER 40013 002 SPECTRUM INSTRUMENTS INC 570 E ARROW HIGHWAY SUITED SAN DIMAS CA 91773 Copyright 2006 SPECTRUM INSTRUMENTS INC Spectrum makes every effort to insure that the information in this document is accurate but makes no claim to that effect and does not guarantee accuracy This information is offered as is and Spectrum cannot be held responsible for any inaccuracies Specifications features and operational characteristics of the described product are subject to change without notice WARNINGS AND NOTICES FCC NOTIFICATION This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the Federal Communications Commission Rules amp Regulations These limits are assigned to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this user manual may cause harmful interference to radio communications Operation of this equipment in a residential area may cause harmful interference in which case the user will be required to correct at his own expense DC POWER CONNECTION Exercise caution when connecting a power source to the Intelligent Reference TM 4D The standard model is su
14. M 4 GENERATED MULTIPLEXER 1 OUTPUT POP INTERNAL TM 4 GENERATED PROGRAMMED OUTPUT PULSE MUX2 INTERNAL TM 4 GENERATED MULTIPLEXER 2 OUTPUT TTL DIGITAL 1 EXTERNAL USER SUPPLIED OPTIONAL DIGITAL INPUT 1 TTL DIGITAL 2 EXTERNAL USER SUPPLIED OPTIONAL DIGITAL INPUT 2 TTL DIGITAL 3 EXTERNAL USER SUPPLIED OPTIONAL DIGITAL INPUT 3 TTL DIGITAL 4 EXTERNAL USER SUPPLIED OPTIONAL DIGITAL INPUT 4 PPS INTERNAL TM 4 GENERATED PULSE PER SECOND TERM N A INTERNAL TERMINATE AT 50 OHMS DBFx ENABLE OUTPUT ENABLE FRONT OUTPUT 1 2 3 4 5 6 7 8 9 Na Page 7 ANALOG SECTIONS The output banks in the analog sections are similarly configured JP9 and JP10 are the corresponding signal configuration jumper blocks The analog banks are designed to operate independently or may share the same signal depending upon the jumper settings or presence of a bridging jumper on JP12 The first position in the jumper block is labeled TM 4 10 MHZ The TM 4D comes equipped from the factory unless specified otherwise with both stages of the analog section set to the 10 MHz sine wave output from the internal TM 4 with both termination jumpers removed see below The second position in the jumper block is labeled FILTER A or B In a TM 4D optionally equipped with the square to sine convertors a sine wave signal created from a signal that the internal TM 4 generates will appear at this position Note that the TERM jumper should be
15. T REFERENCE TM 4D The Intelligent Reference TM 4D is an enhanced version of the Intelligent Reference TM 4 It incorporates all of the features of the TM 4 and adds user configurable distributed digital and analog outputs visible signal indicators and external user configurable inputs If you are not familiar with the setup and operation of the standard TM 4 you are encouraged to read its manual first in order to become familiar with basic TM 4 operation and characteristics before attempting to operate or configure the TM 4D The additional features some are optional offered by the Intelligent Reference TM 4D are Up to 16 rear panel and 8 front panel fully isolated digital outputs with TTL CMOS drive capability into 50 ohms Up to 8 rear panel and 4 front panel buffered analog outputs with 2 volt prp signal level into 50 ohms Output signals may consist of signals generated by the internal TM 4 or those supplied by the user externally Two independent very wide range frequency synthesizers allowing the generation and distribution of custom signals Two independent square to sine wave convertors Standard DB 9 RS 232 control port for connection to a personal computer without the need for a special cable Mirroring of all TM 4 functions signals and inputs at the DB 15HD connector Cables designed for the standard TM 4 may be used at this connector Rear analog and digital inputs for distributing externally supplied sig
16. TRACT NEGLIGENCE STRICT LIABILITY OTHER TORT OR OTHERWISE EXCEED THE PURCHASE COST OF THE PRODUCTS IN RESPECT TO WHICH SUCH CAUSE ARISES OR AT THE OPTION OF SPECTRUM THE REPLACEMENT OF SUCH PRODUCTS IN NO EVENT SHALL SPECTRUM BE LIABLE FOR INCIDENTAL CONSEQUENTIAL OR PUNITIVE DAMAGES RESULTING FROM ANY SUCH CAUSE RETURNING EQUIPMENT FOR REPAIR Page 16 Should it become necessary for you to return equipment for repair please take the following steps 1 Contact us to obtain a Return Material Authorization RMA number We can only accept repair returns if an RMA has been obtained 2 Carefully pack the equipment and clearly mark the RMA number on the outside of the package 3 Ship the package freight or postage prepaid insurance is recommended to the above address unless you have been given an alternate shipping address at the time the RMA number was assigned Be sure to include any items or accessories that we have asked to have included and any information that may be helpful in resolving the problem Also be sure to include your name and information on how to contact you so that we can get additional information from you if needed and let you know when the equipment has been repaired We will make every effort to repair your equipment and have it on its way back to you within five working days from the time it arrives at our repair facility Page 17 APPENDIX A SPECIFICATIONS PHYSICAL TM 4D HEIGHT 1 72 in 44 mm
17. a the coaxial DC input jack The AC power adaptor supplied with the TM 4D is a universal switching power supply that operates from 100 240 VAC at 50 60 Hz and it supplies 24 VDC at 1 5 amperes The input cord for this supply may be substituted for compatibility with non US AC sockets The output cord plugs directly into the TM 4D In cases where the Spectrum power supply is not being used you may supply power to the Intelligent Reference TM 4D from any source that can supply a clean DC voltage in the range of 12 to 35 VDC at 2 amperes Use caution when supplying power and be sure to observe correct polarity of the power connections The center pin of the DC input jack must be positive The Intelligent Reference TM 4D contains an internal AGC 3 fuse that is user replaceable Page 6 Avoid applying power to the unit with the power switch depressed in the ON position Make the power connection first then apply power with the switch CONNECTIONS AND CONFIGURATION Unless otherwise specified the TM 4D comes configured from the factory to supply PPS on digital output banks 1 and 2 POP on digital output bank 3 and MUXI on digital output bank 4 The analog output banks are configured to supply the primary usually 10 MHz frequency output of the internal TM 4 If you desire different outputs or combinations you may remove the top cover and change jumper configuration See the board layout diagram in Section 3 The digital sectio
18. ch on front panel available Configurable in combinations from 1 12 to 2 6 Page 19 AVAILABLE DISTRIBUTION AMPLIFIER OUTPUTS DIGITAL 1 PPS OUTPUT DRIVE TTL levels into 500 PULSE WIDTH Positive pulse 1 ms nominal rising edge on time RISE TIME 10 ns maximum PROGRAMMED OUTPUT PULSE Drive TTL levels into 50Q Rise amp Fall Time 10 ns maximum Pulse Width User selectable 1 usec to 250 ms nominal Polarity Selectable MULTIPLEXER OUTPUT Drive TTL levels into 500 Rise amp Fall Time 10 ns maximum MUX1 1 kHz 10 kHz 100 kHz 1 MHz 5 MHz 10 MHz PPS optional baseband IRIG MUX2 10 MHz MUX1 mirror PPS optional baseband IRIG optional baseband NASA 36 optional outputs 1 3 OPTIONAL SERIAL TIME CODE OUTPUT Type TTL levels into 500 Time Code IRIG B NASA 36 other codes available OPTIONAL AUXILARY FREQUENCY OUTPUT Frequency Almost any standard frequency including T1 E1 VCXO derived GPS locked up to 125 MHz Divide down and multiply up possible Factory set Drive TTL levels into 500 Accuracy Same as primary frequency output Meets Stratum 1 MTIE specifications Rise amp Fall Time 10 ns maximum Output 50 duty cycle OPTIONAL FILTERED TIMING PULSE OUTPUT Frequency Virtually any frequency up to 100 kHz such as 1 Hz 25 Hz and 216 2 3 Hz Factory set Characteristics Coherent with 10 MHz output Leading edge synchronized to average value of PPS from GPS Extremely low jitter Drive TTL level
19. dition current consumption will increase somewhat because outputs that were initially disabled become active INPUT WARM UP OPERATING VOLTAGE CURRENT CURRENT 1 50A 700mA 800mA 350mA Page 14 SECTION 7 IN CASE OF DIFFICULTY NOTE Should you have difficulty with the installation or operation of your TM 4D please take a few minutes to look through this manual and the companion manual for the internal TM 4 You will find the answers to most of your questions in these documents If you are still having difficulty after reviewing the manual please contact us for technical support and assistance ELECTROMAGNETIC INTERFERENCE AND COMPATIBILITY The Intelligent Reference TM 4 radiates very little electrical noise and should not create interference problems in most installations It has been tested and found to comply with FCC Part 15 Class A requirements In critical situations consider the following precautions 1 Always use a fully shielded cable to connect to the host computer or other controlling device 2 Use shielded and terminated cables to connect signals from the TM 4 to other equipment 3 Run a ground wire from the TM 4 s chassis to an earth ground point in your system such as an AC safety ground or ground rod A solder lug placed under one of the connector retention nuts of the DB15 connectors on the rear panel is a good way to connect such a ground line 4 Apply a ferrite sleeve to the AC adaptor wire at the
20. e TM 4 are PPS MUX 1 MUX2 and POP In addition OUT1 and OUT2 are custom signals that may originate from the internal TM 4 if they are factory enabled The remaining four inputs TTL DIGITAL 1 4 correspond to the optional BNC external digital inputs Note that in the standard TM 4D the front input and output jacks are optional The front input output selection jumpers 5 JP8 are factory wired to select the rear inputs only SIGNAL FLOW DIGITAL SECTION INTERNAL TM 4 MUX1 MUX2 POP PPS OUT1 OUT2 FREQUENCY SYNTHESIZER 1 SQUARE to SINE DIGITAL OUTPUT BANK 1 CONVERTOR 1 JUMPER FRONT AND REAR OUT 1 CONVERT TO ANALOG oun DIGITAL OUTPUT BANK 2 DB 15HD FRONT AND REAR OUT C FOR DIGITAL OUTPUT BANK 3 DIGITAL O AND REAR OUT INPUTS FACTORY CONNECTIONS 1 4 DIGITAL OUTPUT BANK 4 FRONT INPUTS FRONT AND REAR OUT INPUT SELECT CONVERTE CONVERT TO ANALOG FREQUENCY SYNTHESIZER JP5 JP8 2 REAR INPUTS Page 2 SIGNAL FLOW ANALOG SECTION INTERNAL TM 4 10 MHz PRIMARY REFERENCE JUMPER BLOCK JP9 TM 4 OUT1 ANALOG OUTPUT BANK A ANALOG FRONT AND REAR OUTPUTS SINE to SQUARE CONVERTOR 1 BANK A EXTERNAL A INPUTS JP12 BRIDGE EXTERNAL B INPUTS JUMPER BLOCK JP10 SINE to SQUARE CONVERTOR 2 ANALOG OUTPUT BANK B ANALOG FRONT AND REAR OUPUTS TM 4 OUT1 BANK B 10 MHz PRIMARY REFERENCE DB 15HD The analog section is si
21. ector are in parallel with the same connections on the DB 15HD connector See the user manual for the Intelligent Reference TM 4 for details about the Control Display software and how to communicate with the unit EXTERNAL DIGITAL INPUTS 1 4 OPTIONAL Depending upon the configuration of the unit as ordered there may be as many as eight four on the rear panel four on the front BNC style input jacks on the TM 4D There are four independent user configurable digital sections designed for TTL CMOS level signals up to 200 MHz Page 13 EXTERNAL ANALOG INPUTS A AND B OPTIONAL Similar to the digital sections there are two independent analog sections Bandwidth for the analog circuits is 300Hz to 150 MHz There may be as many as four two on the rear panel two on the front BNC style input jacks on the TM 4D depending upon how the unit is configured DIGITAL OUTPUTS 1 4 A standard TM 4D has 16 buffered digital output jacks on the rear panel These outputs may all provide the same signal or they may provide up to four different signals Optionally there may be eight additional outputs available on the front of the unit Signal selection is accomplished via the internal configuration jumpers JP1 4 Each output is designed to drive a 50 ohm load ANALOG OUTPUTS A AND B The standard unit has eight isolated analog output jacks on the rear panel These outputs may provide the same signal or they may provide two different signals
22. evel of accuracy See section 6 for a detailed discussion of various signals when they are available and their precision at various points in the startup phase Page 5 SECTION 4 DETAILED SETUP INSTRUCTIONS INTELLIGENT REFERENCE TM 4D INSTALLATION There are no special requirements for the location of the unit itself other than the obvious considerations of access for cable connections and visibility of the front panel LEDs Avoid electromagnetic interference keep the unit and its cabling away from sources of strong radio frequency RF energy such as radio transmitter cables and antennas Also keep the unit away from sources of heat Normally no special cooling provisions are required as long as adequate clearance is provided around the unit so that internally generated heat can dissipate by natural air convection The unit may be operated either standalone or in a rack mount configuration If mounting the unit in a rack It is best to use the flat spacers provided though they are not absolutely necessary If you do not have the spacers contact Spectrum for replacements Normally the factory configures the front panel according to the mounting requirements specified by the user at order time If you did not specify rack mounting at order time but later wish to rack mount the unit the laminate over the mounting holes will have to be cleared out The easiest way to accomplish this is to carefully carve them with an eXacto knife
23. f this is the first time the unit has run or if its position is substantially different from the last time it was operated then use the software to enter an approximate position This will help to speed up satellite acquisition time Page 4 LED INDICATORS LEDs on the front panel of the unit are used to indicate various operating parameters POWER Illuminated when power is supplied to the unit ANALOG A B Illuminated when signal is present at the output of the corresponding analog signal jumper block DIGITAL 1 2 Illuminated when signal is present at the output of the corresponding digital signal jumper block Blinks with signals below about 10 Hz at the signal rate ALARM Illuminates and flashes to indicate tuning mode and Coast Alarm condition See chart on page 11 READY Illuminates or flashes in combination with the STATUS indicator to indicate tuning status STATUS Illuminates in combination with the READY indicator to indicate tuning status Flashes to indicate antenna failure or absence of the primary output frequency from the internal TM 4 See section 6 for more detailed information about how these indicators function during various phases of operation After initial setup the TM 4D requires no further user intervention Depending upon your required level of accuracy you may start using the available signals immediately or you may wait for the READY LED to illuminate to indicate that the unit has reached a minimum l
24. installed when using this signal The positions labeled FRONT JACK and REAR JACK correspond to the external signals from either the rear or optional front input jacks The TM 4 OUT position corresponds to the signal from the internal TM 4 such as an optional modulated IRIG time code or from the OUTI pin on the DB 15HD connector The FA ENABLE and FB ENABLE positions allow the optional front outputs to become operational The signal that is selected on the jumper block will also appear at the optional front outputs The TERM position terminates the signal line with a 50 ohm load If a small amount of gain for the analog signal is desired the user may choose to omit the termination jumpers Note that this may or may not result in signal degradation depending upon several factors and the user is therefore advised to confirm that the distributed signal is acceptable at the anticipated output conditions before proceeding JP12 ANALOG IN BRIDGE allows the user to supply the identical signal from either input jack to both analog stages If a jumper is installed in the JP12 position there must only be one input signal supplied on one or the other but not both input jacks In bridged mode omit both termination jumpers for a 50 ohm termination JP12 is located near the bottom of the digital input jumpers The TM 4D comes configured from the factory set to deliver the internal 10 MHz signal to both sets of analog jacks If you elect to change the
25. male ALARM OUTPUT Open collector 25 mA current capability RS 232 notification of hardware fault SERIAL TIME MESSAGE RS 232C 1200 38400 bps 8 N 1 NETWORK TIME PROTOCOL Optional Compatible with Type 11 public domain drivers NMEA MESSAGES GPZDA GPRMC GPGGA EXTERNAL EVENT INPUT Event Time Tag feature TTL CMOS level edge triggered Active edge is software selectable ANTENNA INPUT CONNECTOR TNC POWER 5 VDC on center conductor short circuit protected OPTIONAL EXTERNAL INPUTS REAR PANEL CONNECTOR BNC DIGITAL INPUTS 1 4 ANALOG INPUTS A amp FRONT PANEL CONNECTOR BNC DIGITAL INPUTS 1 4 ANALOG INPUTS amp B OPTIONAL OUTPUTS FRONT PANEL CONNECTOR BNC DIGITAL OUTPUTS 1 4 ANALOG INPUTS amp B POWER INPUT SUPPLY VOLTAGE 12 to 35 VDC WARM UP CURRENT 800 mA 350 mA 24 VDC OPERATING CURRENT 400 mA 24 VDC AC POWER ADAPTER Included 90 264 VAC 47 63 Hz to 24 VDC 3 A CONNECTOR 2 5 mm coaxial jack center pin positive CAUTION NEVER APPLY INPUT POWER TO ANY PINS ON THE DB 15HD CONNECTOR Page 21
26. milarly configured It can accept analog signals from the internal TM 4 such as the 10 MHz sine wave optional modulated IRIG or custom signals signals from optional external input jacks or the output of the optional square to sine convertor The square to sine convertor is a factory configured feature that allows a generated or supplied digital signal to be converted into a sine wave and distributed as desired Each bank may operate independently or may share one input signal Each bank is terminated via a jumper at 50 ohms IMPORTANT If both banks are set to the same signal or the external input jacks are bridged be sure to remove both of the terminating jumpers for a 50 ohm termination FACTORY DEFAULT SETTINGS The standard factory configuration of the TM 4D assigns signals from the internal TM 4 to the distribution amplifier outputs in the following manner PPS Digital output banks 1 and 2 MUXI Digital output bank 3 MUX2 Digital output bank 4 10 MHz Analog output banks A and B Page 3 SECTION 3 GUICK START AND SETUP This section is provided as an overview and simplification of the steps needed to configure and operate a standard Intelligent Reference TM 4D with no options installed For comprehensive setup instructions and details on optional and advanced features see sections 4 5 and 6 SETUP Setting up the TM 4D is a simple and straightforward process If no changes are desired from the default configuration
27. nals Front analog and digital inputs for distributing externally supplied signals Indicators for analog and digital signal presence Standard 19 1U rack mount or benchtop with included rubber bumpons GPS timing antenna and AC power supply included Page 1 SECTION 2 SIGNAL FLOW AND ARCHITECTURE OVERVIEW In order to take maximum advantage of the capabilities of the Intelligent Reference TM 4D M it is important to gain an understanding of the methods of signal generation and their path through the unit The TM 4D contains four digital sections 1 4 consisting of input selectors and up to 24 outputs and two analog sections A B consisting of input selectors and offering up to 12 outputs Some sections are custom in nature such as the frequency synthesizers and are factory set and others are user configurable The user may set all the digital sections to the same signal or may choose any combination of up to four different signals depending upon the application The analog portion is similar except that there are two sections not four Normally the internal TM 4 generates the signals distributed and the TM 4D will come configured by the factory to standard defaults unless otherwise specified The user may choose standard input signals from the internal TM 4 or from optional external input BNC jacks in any desired combination This is accomplished by simple jumper changes inside the unit Standard digital signals available from th
28. ns of the TM 4D are configured with four blocks of jumpers one for each of the four digital output banks Each bank may be set to the same signal if desired The jumpers correspond to either signals generated internally by the TM 4 OUT1 OUT2 PPS POP MUX1 MUX2 or signals the user supplies via the optional external input jacks TTL DIGITAL 1 4 There are two other jumper positions on each block One is the enable for the optional front outputs marked DBFx ENABLE where x corresponds to the number of the digital output When this jumper is installed the front outputs are slaved to whatever signal choice is selected at the corresponding jumper block The last position is marked TERM and terminates the input signal with a 50 ohm load Depending upon application and characteristics you may or may not wish signal sources to be internally terminated Note that 1f you send identical signals to more than one output bank you should only use one terminator jumper for the combined group since they are now in parallel with each other Note that the optional external input jacks may be further sub divided into front and rear inputs via jumpers JP5 JP8 if the unit is configured for both front and rear external inputs DIGITAL OUTPUT CONFIGURATION JUMPER BLOCKS JP1 JP4 POSITION SIGNAL SIGNAL TYPE FUNCTION OUT1 INTERNAL TM 4 GENERATED OPTIONAL TM 4 DIGITAL SIGNAL OUT2 INTERNAL TM 4 GENERATED OPTIONAL TM 4 DIGITAL SIGNAL MUX1 INTERNAL T
29. pplied with the correct AC power adaptor If you choose to power the unit in some alternative fashion be sure to observe correct voltage and polarity The unit requires 12 35 volts DC with the tip of the power connector positive While the TM 4D is reasonably protected against reverse polarity no protection scheme is foolproof Damage due to incorrect powering of the Intelligent Reference TM 4D is not covered by the warranty ii TABLE OF CONTENTS SECTION 1 7 INTRODUCTION TO THE INTELLIGENT 40 4 SECTION 2 a SIGNAL FLOW AND ARCHITECTURE OVERVIEW testes e SECTION 3 c QUICK START AND 4 OETUB Ae te eric BEd eon ted ta eats 4 LEDANDIGATORS wits tac Aine tee hist ne t ue re ei ceret eei xod i dere ries 5 SECTION 4 DETAILED SETUP INSTRUCTIONS 6 INTELLIGENT REFERENCE TM 4D INSTALLATION 0 cece eee HM 6 CONNECTION A PERSONAL 6 PONVER INBLET inaning tet troie ibi aste a E e de me ot denos 6 CONNECTIONS AND CONFIGURATION s HH 7 cried te epp Eri obscene EE
30. provided by this warranty are the Buyer s sole and exclusive remedies Spectrum shall not be liable for any direct indirect special incidental or consequential damages resulting from the Buyer s use of this product or software supplied by Spectrum NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED SPECTRUM SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE TITLE OR NONINFRINGEMENT OR ANY OTHER OBLIGATION ON THE PART OF SPECTRUM NO DESCRIPTIONS OR SPECIFICATION SHEETS SHALL BE DEEMED A WARRANTY BY DESCRIPTION OR OTHERWISE HAVE ANY LEGAL EFFECT IT IS THE BUYER S SOLE RESPONSIBILITY TO DETERMINE THE SUITABILITY OF THE PRODUCT FOR THE INTENDED USE PRIOR TO PURCHASE Some states and jurisdictions do not allow limitations on warranties so some or all of the above limitations may not apply to you BUYER S SOLE AND EXCLUSIVE REMEDY AND SPECTRUM S SOLE LIABILITY WITH RESPECT TO ANY BREACH OF WARRANTY SHALL BE AT SPECTRUM S OPTION A REPAIR OR REPLACEMENT OF THE DEFECTIVE OR NONCONFORMING PRODUCT OR B REFUND OF BUYER S PURCHASE PRICE FOR THE DEFECTIVE OR NONCONFORMING PRODUCT THE REMEDIES SET FORTH HEREIN SHALL CONSTITUTE THE EXCLUSIVE REMEDIES AVAILABLE TO BUYER AND ARE IN LIEU OF ALL OTHER REMEDIES THAT WOULD OTHERWISE BE AVAILABLE TO BUYER IN NO EVENT WILL SPECTRUM S TOTAL LIABILITY FOR ANY AND ALL LOSSES AND DAMAGES ARISING OUT OF ANY CAUSE WHATSOEVER WHETHER SUCH CAUSE BE BASED ON CON
31. r blocks and to the DB 15HD and all of the external inputs from the DB 15HD such as ETT also go to both the internal TM 4 and to the input jumper blocks It is possible to generate a signal with the internal TM 4 supply that signal to the jumper blocks and distribute it and also to tap it at the DB 15HD and use it somewhere else Note that since this signal is paralleled and not individually buffered at this point in the signal path it is possible for some degradation ringing level change or noise to occur if the TM 4D is used in this fashion The user will have to determine if any degradation that may occur is acceptable in the application DB 15HD CONNECTOR PIN FUNCTIONS SIGNAL NAME FUNCTION OUT2 10 MHZ TTL OUTPUT OR CUSTOM OUT GND SIGNAL POWER GROUND CPTXD232 RS 232 SERIAL DATA TO HOST CPRXD232 RS 232 SERIAL DATA FROM HOST PPS AUX232 PPS CUSTOM TPTXD232 TIME PORT RS232 OUTPUT MUXOUT1A MULTIPLEXER 1 A OUTPUT ALM ALARM OUTPUT GND SIGNAL POWER GROUND EVENT EVENT INPUT N C NO CONNECTION POP PROGRAMMED OUTPUT PULSE MUXOUT2 MULTIPLEXER 2 OUTPUT IN1 RESERVED OUT1 IRIG IN2 OUTPUT TIME CODE CUSTOM INPUT 1 2 3 4 5 6 7 8 DB 9 CONNECTOR This connector is for RS 232 serial communications with the internal TM 4 Use a 9 pin monochrome monitor extension cable available at most computer retailers and the supplied Control Display software to communicate with and control the internal TM 4 The connections at this conn
32. s into 500 Accuracy Same as primary frequency output Meets Stratum 1 MTIE specifications Rise amp Fall Time 10 ns maximum Pulse Width Positive pulse 10 usec nominal Rising edge on time OPTIONALWIDE RANGE PLL FREQUENCY SYNTHESIZER OUTPUT Frequency Almost any desired frequency up to 125 MHz Factory set Drive TTL levels into 50 Accuracy Same as for 10 MHz sine wave output Meets Stratum 1 MTIE specifications Rise amp Fall Time 2 ns maximum Output 50 duty cycle ANALOG PRIMARY FREQUENCY 10 MHz standard OUTPUT DRIVE High spectral purity sine wave 10 dBm into 500 2dB OPTIONAL IRIG SERIAL TIME CODE OUTPUT Type Modulated Output Level 2 7 V into 6000 Modulation Level 3 3 1 OPTIONAL SECONDARY SINE WAVE OUTPUT Frequency Identical to or independent of primary output frequency Drive High spectral purity sine wave 10 dBm into 500 2dB OPTIONALWIDE RANGE FREQUENCY SYNTHESIZER OUTPUT Frequency Almost any desired frequency up to 125 MHz Factory set Drive High spectral purity sine wave 10 dBm into 500 2dB OPTIONAL CTCSS PL TONES x2 Frequency Selectable from table of predetermined standard tone frequencies 67 0 Hz to 250 3 Hz Page 20 ADDITIONAL INPUTS AND OUTPUTS SERIAL CONTROL I O CONNECTOR DB 9 female SERIAL CONTROL I O RS 232C 9600 bps 8 N 1 MESSAGE FORMAT ASCII Spectrum format MODE Continuous broadcast or individual message polling AUXILIARY 1 0 CONNECTOR DB 15HD fe
33. te a hardware fault detected by the internal TM 4 Under normal operating conditions it will be on The internal TM 4 has a current sensing circuit that monitors the antenna and cable condition for open or short and a circuit that monitors the primary frequency output In the case ofa detected hardware fault this LED will change from steady illumination to a flashing state ALARM READY STATUS LED COMBINATIONS AND THEIR MEANINGS STATUS INTERNAL TM 4 STATUS rapid flash rapid flash rapid flash Start up The unit is completing initialization tasks on off on flash Warm up GPS is not yet supplying valid time information off off on flash Warm up Time Valid GPS is supplying valid time information off on flash Oscillator coarse tuning Mode 2 GPS is normal off on flash Coarse tuning hold Mode 3 Unit is in coast mode due to lack of input from GPS on flash Oscillator fine tuning Mode 4 Accuracy better than 1x10 GPS is normal on flash Fine tuning hold Mode 5 Unit is no longer fine tuning due to lack of input from GPS but is using Intelligent Holdover technology to maintain oscillator accuracy In hold mode for less than 60 minutes on flash Coast Alarm Same as above but unit has been in this condition for more than 60 minutes The STATUS LED will indicate hardware faults in these modes by flashing POWER INPUT Power is supplied to the unit via the coaxial DC input jack and a standard power supply is
34. the standalone TM 4 and in its manual the STATUS LED is called the POWER LED After the initialization the TM 4 searches for GPS satellites and acquires the satellite signals The amount of time this process takes depends upon several factors the most important being how complete and up to date the stored information is that resides in the unit s memory Other factors include whether the unit has ever achieved a position fix or has been moved since obtaining it the view of the sky the antenna has and what search mode the receiver is using Refer to the TM 4 user manual for suggestions to improve initialization time After the TM 4 has acquired the satellite signals and has made the appropriate calculations it begins to provide accurate time information and PPS output for synchronization This is called the Time Valid state and is indicated by the ALARM LED extinguishing The unit then uses GPS timing information to tune its oscillator in order to provide an accurate frequency output Tuning is a continuous process that starts with coarse tuning Mode 2 and progresses to fine tuning Mode 4 As long as the unit is tracking satellites it continues to fine tune and improve its accuracy and stability The PPS output should not be used until the unit achieves the Time Valid state since it is not locked to GPS until then If your unit is equipped with a TM 4 optimized for phase coherency you should not use PPS for anything important until the
35. tion for antenna cable length and system delays Sets absolute timing accuracy and synchronization to other system components AVAILABLE OPTIONS External signal inputs front and or rear IRIG and or NASA serial time code output modulated and baseband Network Time Protocol Type 11 GPS corrected PLL frequency synthesizer output to 125 MHz x3 Auxiliary frequency output to 125 MHz Filtered timing pulse output Coherent CTCSS PL tone generator Secondary sine wave output x2 Substitute other frequency for primary frequency output Higher baud rates for serial time messages Custom multiplexer and or other outputs Custom functions Customized user software DISTRIBUTION AMPLIFIER DIGITAL Capacity to distribute as many as four separate signals generated with internal TM 4 OEM External input capability optional on front or rear panel Distributes to four banks of four outputs each on rear panel Sixteen outputs standard BNC jacks Configurable 1 4 1 8 1 12 1 16 2 4 2 8 4 4 Optional four banks of two additional outputs each on front panel available Configurable in combinations from 1 24 to 4 6 ANALOG Capacity to distribute as many as two separate signals generated with internal TM 4 OEM External input capability optional on front or rear panel Distributes to two banks of four outputs each on rear panel Eight outputs standard BNC jacks Configurable 1 4 1 8 2 4 Optional two banks of two additional outputs ea
36. umper blocks If the signal frequency is lower than about 10 Hz these LEDs will flash at the signal rate For signal rates higher than this they will illuminate steadily ALARM LED This LED indicates the general status of GPS Under normal useable operating conditions it will be off It will illuminate steadily while the unit acquires GPS satellites and waits for the Time Valid condition Once time is valid this LED will turn off As long as the unit is receiving satellites it will stay off If the satellite signal is disrupted the ALARM LED will flash warning that the unit is in hold If the TM 4 has achieved Mode 4 and loses the GPS satellite signal it will stay in fine tuning hold mode Mode 5 for 60 minutes and then the ALARM LED will illuminate steadily to indicate a Coast Alarm condition READY LED This LED indicates confidence in the accuracy of the reference outputs Under normal useable operating conditions it will be on to indicate that the TM 4D has reached a minimum acceptable accuracy level of 1 in 10 parts After initialization it will stay off until the unit acquires GPS When the unit enters coarse tuning mode this indicator will begin to flash Once the TM 4D enters the fine tuning mode the LED will stay on If the unit subsequently enters the fine tuning hold mode 5 condition this indicator will again flash If the TM 4D enters Coast Alarm the LED will turn off Page 11 STATUS LED This LED is used to indica
37. was at Spectrum s repair facility or for a period of ninety 90 days from the date of return shipment whichever is longer To obtain repair under this warranty Buyer must obtain a Return Material Authorization Number RMA from Spectrum and return the product to a designated repair location freight prepaid All returned products must be accompanied by complete documentation including the RMA and product discrepancy report Spectrum shall pay shipping costs to return the product to the Buyer In the case of products returned from another country the Buyer shall pay all applicable duties or taxes required and freight charges both ways Products not qualifying for warranty service will be returned at Buyer s risk and expense Spectrum may charge at its standard rates for any handling of such products EXCLUSIONS This warranty shall not apply to defects caused by abuse neglect accident improper repair alteration unreasonable use of the product by the Buyer or damage in shipment to Spectrum for repair Spectrum shall make the evaluation of the item and shall be the sole determiner of its eligibility for or exclusion from warranty coverage Software included with the product if any is intended but not guaranteed to run on any Windows95 or higher based computer and is provided solely for the convenience of the Buyer It is supplied as is and is expressly excluded from any warranty LIMITATIONS amp DISCLAIMER The remedies
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